Which unit could be used for the rate of a chemical reaction?

A.     mol

B.     \({\text{mol}}\,{\text{d}}{{\text{m}}^{ - 3}}\)

C.     \({\text{mol}}\,{\text{d}}{{\text{m}}^{ - 3}}{{\text{s}}^{ - 1}}\)

D.     \({\text{d}}{{\text{m}}^{\text{3}}}\)

C